Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae6ad05d65d417a…

MALICIOUS

PDF

80.1 KB Created: 2021-06-08 01:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 65af9e479e8656a54519c716d2f2b236 SHA-1: 6a5c25ed860ef0e1b341ffbf71c103b469dde5df SHA-256: 9ae6ad05d65d417a48211276e497e6bdb7483b8e0d82d550803c82a1891ec02a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable hosting and link farms, indicating a likely SEO manipulation or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://inwebjor.ru/pbw?utm_term=what+does+goddaughter+mean+in+spanish PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474206/normal_604844d9c5e58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383149/normal_6036828f82345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459483/normal_5fd9bfab2bed5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423154/normal_60341c00caad8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428045/normal_5fcece5c75c6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489853/normal_605c3effc367d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478716/normal_602a583386dc6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453907/normal_5fee3f1c5daf7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446634/normal_5feebaf3ca7f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458849/normal_600315ac4fe35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465703/normal_604f79487a45f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394079/normal_602f881b8851f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426279/normal_5fe80c3671c66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477863/normal_604f3de374ad9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rukutuxeriro.pbworks.com/f/how_to_treat_a_chicken_with_a_broken_leg.pdfIn PDF document text
    • http://lopofemusun.pbworks.com/w/file/fetch/144503451/nijuk.pdfIn PDF document text
    • http://tarogifere.pbworks.com/w/file/fetch/144524736/sozimonenupiwekupara.pdfIn PDF document text
    • http://zopilep.pbworks.com/w/file/fetch/144794832/vaaste_full_movie_download_filmywap.pdfIn PDF document text
    • http://gaxezuv.pbworks.com/w/file/fetch/144809583/rekuxo.pdfIn PDF document text
    • http://kigemulu.pbworks.com/w/file/fetch/144547707/15602055611.pdfIn PDF document text
    • http://xigivesupi.pbworks.com/f/alquimia_para_el_xito_gua_para_emprendedores_gratis.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE169 5356 bytes
SHA-256: f17118b5a3efb5b04934ddb2ce4121482ecf7fb51c28cbd2ca1694b1300a9741
font_01_sfnt_off0000f381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF381 12752 bytes
SHA-256: 4bd93ee1348e8560445fddbbe92cc767442fb54a9d82bc32b43283c90a4eec58
font_02_sfnt_off00011c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7F 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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